Customers most agreed on the following attributes:
Works great, better than my old spyder. My Dell monitor is now calibrated to the prints I get from my photo lab.
I really cant tell a difference in before or after I used this.
I started out with 3 displays on 3 computers (laptop, LCD monitor and CRT) and a photo printer. Epson supplied an ICC profile for the printer, but on the displays, colors looked wildly different.
After running the Eye One procedure on each display, colors match on the displays, and match those produced by the inkjet printer. Success.
The Eye One is somewhat quirky, but it's just a matter of getting used to it.
At first, the counterweight was difficult to attach to the USB cable. The workaround is to drag the cable through the groove in the counterweight while pushing the counterweight onto the cable.
After about the 2nd or 3rd calibration, the Eye One sensor wouldn't stick to my CRT screen. After I slightly wetted the suction cups, they stuck tightly. Another problem solved.
The product comes with a nearly useless quick start guide, and you are left with on-screen instructions that make using the Eye One for the first few times a fun puzzle that needs to be solved. Keep clicking on things! Don't worry, you'll figure it out.
Display calibration couldn't get easier: Installed the software, plugged in the Eye One LT. Everything is pretty much automatic. I spent some time comparing this, the Spyder2 and the Huey Pro before deciding to get this. The other two might be cheaper but from what I have read, this is the best you can get for the price. I took the plunge and am happy to say that it is perfect! The pictures I print out are exactly like the images on screen. I sometimes had problems with pictures being either too bright or too dark and sometimes had weird color casts when printed. That's the primary reason I got this - now I'm happy.